From 32fc31fb13d4381dc4b2124df4f13cbcbde7fb8b Mon Sep 17 00:00:00 2001
From: Zach Hilman <zachhilman@gmail.com>
Date: Wed, 26 Sep 2018 22:15:05 -0400
Subject: patch_manager: Add DLC recognition to PatchManager

---
 src/core/file_sys/patch_manager.cpp | 26 ++++++++++++++++++++++++++
 src/core/file_sys/patch_manager.h   |  1 +
 2 files changed, 27 insertions(+)

(limited to 'src/core')

diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 4b3b5e665..5ac2b987e 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -18,6 +18,7 @@
 namespace FileSys {
 
 constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
+constexpr u64 DLC_BASE_TITLE_ID_MASK = 0xFFFFFFFFFFFFE000;
 
 std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
     std::array<u8, sizeof(u32)> bytes{};
@@ -35,6 +36,7 @@ std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
 constexpr std::array<const char*, 2> PATCH_TYPE_NAMES{
     "Update",
     "LayeredFS",
+    "DLC",
 };
 
 std::string FormatPatchTypeName(PatchType type) {
@@ -139,6 +141,7 @@ std::map<PatchType, std::string> PatchManager::GetPatchVersionNames() const {
     std::map<PatchType, std::string> out;
     const auto installed = Service::FileSystem::GetUnionContents();
 
+    // Update
     const auto update_tid = GetUpdateTitleID(title_id);
     PatchManager update{update_tid};
     auto [nacp, discard_icon_file] = update.GetControlMetadata();
@@ -161,6 +164,29 @@ std::map<PatchType, std::string> PatchManager::GetPatchVersionNames() const {
     if (lfs_dir != nullptr && lfs_dir->GetSize() > 0)
         out.insert_or_assign(PatchType::LayeredFS, "");
 
+    // DLC
+    const auto dlc_entries = installed->ListEntriesFilter(TitleType::AOC, ContentRecordType::Data);
+    std::vector<RegisteredCacheEntry> dlc_match;
+    dlc_match.reserve(dlc_entries.size());
+    std::copy_if(dlc_entries.begin(), dlc_entries.end(), std::back_inserter(dlc_match),
+                 [this, &installed](const RegisteredCacheEntry& entry) {
+                     return (entry.title_id & DLC_BASE_TITLE_ID_MASK) == title_id &&
+                            installed->GetEntry(entry)->GetStatus() ==
+                                Loader::ResultStatus::Success;
+                 });
+    if (!dlc_match.empty()) {
+        // Ensure sorted so DLC IDs show in order.
+        std::sort(dlc_match.begin(), dlc_match.end());
+
+        std::string list;
+        for (size_t i = 0; i < dlc_match.size() - 1; ++i)
+            list += fmt::format("{}, ", dlc_match[i].title_id & 0x7FF);
+
+        list += fmt::format("{}", dlc_match.back().title_id & 0x7FF);
+
+        out[PatchType::DLC] = list;
+    }
+
     return out;
 }
 
diff --git a/src/core/file_sys/patch_manager.h b/src/core/file_sys/patch_manager.h
index 464f17515..3a2a9d212 100644
--- a/src/core/file_sys/patch_manager.h
+++ b/src/core/file_sys/patch_manager.h
@@ -27,6 +27,7 @@ std::string FormatTitleVersion(u32 version,
 enum class PatchType {
     Update,
     LayeredFS,
+    DLC,
 };
 
 std::string FormatPatchTypeName(PatchType type);
-- 
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